why Fuel whooas

Discussion in 'Fox 5.0 Mustang Tech' started by Mustangr, Feb 22, 2009.

  1. Just had it dyno tuned was running great and now..... Just coming into power band boost starts to increase then it starts holding back. I see fuel pressure fall off completly. If I stay in the throttle it backfires it surges badly.
    what gives internal pump maybe T-rex filter Hmmm
  2. Any drop in fuel pressure would typically indicate a problem with either the pumps or the filter. Either pumps would be adequate for your power levels by themselves…..so I would first look into replacing the fuel filter.

    What is your base pressure set at? What fuel pressure regulator are you running?
  3. I found a couple problems. Open Vacum and a kink in return fuel line. Opps
  4. So all is good now? what was wrong?
  5. I dont know. Now the brand new MSD distributor that I got with the Accel DFI kit is now faulty..I had to return it to MSD. We will see. I want to get the
    Stealth kit from Aeromotive. Has anyone had problems or info about it.